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# quiz4_sol - MATH230 Spring 2008 Name[ft Z[0 Quiz 4 Blue...

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Unformatted text preview: MATH230 Spring 2008 Name: [ft Z [0 Quiz 4 Blue Discussion Section: 20 21 22 23 Closed book, closed notes. (circle one) T 8:00 T 9:00 R 8:00 R 9:00 SHOW ALL WORK. 30 31 32 33 T 10:00 T 9:00 R 9:00 R 11:00 1. 4 points To unlock a “combination” lock, you must turn the dial to three numbers in sequence, so the word “combination” is not really the right word to use. A certain lock has 25 numbers on it (1, 2, , 25). If “combinations” are assigned to locks at random, what is the probability that the ﬁrst number in the “combination” is even? Assume numbers cannot be repeated. 59-SC'FJ9V pass/Alt. Cam’omqb’ms Ms): 19(25, 3) = {3, 800 all (Pm/ya [lyoc/f A=%+%CMMWMmmMm/” AM): IZ-ZLI-Za : (any LVN/MW /-'f €Vﬁﬁ n(4>_ (922.9 Li PKW‘ nfs) ‘ W" 3 2. 4 points A customer at a fruit stand picks 4 oranges at random from a crate containing 60 oranges, of which 3 are rotten. What is the probability that the customer gets exactly 2 rotten oranges? 3'1 §c7L 07C 0/“ ﬂOSS/‘Joiu \$9M/o/CEJ nC9=>C(¢W/%): Haj/035‘ aliegvﬂgz—bkebz [3—2— St'i" 9F- Sin/Olts W172 2. 077704 Unmaq We «2,2» «97,2; = W AM) 4733 A; =’ 1 :. Pr( ) n(\$) 4§33ZZE (009% 3. 2 points Find C(11,7). / COW); 710m)! 2 33“ MATH230 Spring 2008 Name: £6 >5 Z 20 Quiz 4 Green Discussion Section: 20 21 22 23 Closed book, closed notes. (circle one) T 8:00 T 9:00 R 8:00 R 9:00 SHOW ALL WORK. 30 31 32 33 T 10:00 T 9:00 R 9:00 R 11:00 1. 4 points A customer at a fruit stand picks 3 oranges at random from a crate containing 60 oranges, of which 4 are rotten. What is the probability that the customer gets exactly 1 rotten orange? 5 2 55* 0F qll pd‘SS/‘b/L 3954/0/63 Ms): dams): \$022.0 qH era/lye W“; A; Scf‘ WC SOM/QLCS VLM i Cir-994- mm,); cm”) r C(b'calz.) = (0160 n A) (also WM)“- n(3) \$33220 1.!3’00 2. 2points Find C(12,3). I Z ./ Caz/g) : 3.’ ((2%)! 3. 4 points To unlock a “combination” lock, you must turn the dial to three numbers in sequence, so the word “combination” is not really the right word to use. A certain lock has 25 numbers on it (1, 2, , 25). If “combinations” are assigned to locks at random, what is the probability that the ﬁrst number in the “combination” is odd? Assume numbers cannot be repeated. 5: X; A62 qn pquy(b7z Cow, b/MMLIMJ 54(5): PCZS/ 5): l3/ 8’00 or” ezvv//\/~li7‘¢{‘/ ,4 :sckov‘ Comb/ME’MS WW [S’MMWM r401 VIM): /3'2L{’Z_3> " 717E) ‘- ZZO MATH230 Spring 2008 Name: [Le x Z / 0 Quiz 4 Canary ' Discussion Section: 20 21 22 23 Closed book, closed notes. (circle one) T 8:00 T 9:00 R 8:00 R 9:00 SHOW ALL WORK. 30 31 32 33 T 10:00 T 9:00 R 9:00 R 11:00 1. 2 points Find C(13,9). 2. 4 points To unlock a “combination” lock, you must turn the dial to three numbers in sequence, so the word “combination” is not really the right word to use. A certain lock has 30 numbers on it (1, 2, , 30). If “combinations” are assigned to locks at random, what is the probability that all the numbers in the “combination” are single digits? Assume numbers cannot be repeated. 5: Sci— J «rH pass/ML CQMlo/Mr/‘J'ms 4(3) = M30, 3) a 27, 360 a u aid/rt,» Mae/7 ﬂ: .SuL MC (mama‘st vwﬂa 67/] 504016 a’xﬁkl: M4)»- P/m) = W1 nA) 5.3.: - PF“): 575% 3' ZH/Béad ' ’0207 3. 4 points A customer at a fruit stand picks 5 oranges at random from a crate containing 20 oranges, of which 2 are rotten. What is the probability that the customer gets exactly 1 rotten orange? 5: S£7L J or” FVSSI‘b/e amp/c5 “(5): c(zq,>'): 5/307 qll aim/{7, Mai), xt> sea/mac 99mp(c\$ wihﬂ / when vmvc MA): C(Z,/)'C(t834r)= e120 ; M) s M . ' [Dr/A) MS) {5,577 '3? v7 MATH230 Spring 2008 Name: 4 C I 0 Quiz 4 Pink Discussion Section: 20 21 22 23 Closed book, closed notes. (circle one) T 8:00 T 9:00 R 8:00 R 9:00 SHOW ALL WORK. ' 30 31 32 33 T 10:00 T9200 R9:00 R 11:00 l. 4 points To unlock a “combination” lock, you must tum the dial to three numbers in sequence, so the word “combination” is not really the right word to use. A certain lock has 30 numbers on it (1, 2, , 30). If “combinations” are assigned to locks at random, what is the probability that all the numbers in the “combination” are double digits? Assume numbers cannot be repeated. 5“- 51/” tic 4/! [bras/UL cm bike/‘73“; n(\$) 3 P600, 3) = be/ HBO 3! 61H 67V7//7'* /)',Ic¢,/\/ ff’; SCf’a‘F (‘w‘bl‘hqh'mi or” de/L anal)? mm): Mina) = 7W0 VIM) _ 7‘390 “(8) ' 2%, 3G0, : 2. 2points Find C(10,6). / lO . C([O,(9)= (0x ’- Z (O r («o—e)! 3. 4 points A customer at a fruit stand picks 4 oranges at random from a crate containing 20 oranges, of which 3 are rotten. What is the probability that the customer gets exactly 2 rotten oranges? Sageraf- q“ pass/Mb 97‘Mp(¢3 f Ms): C(M/H‘) eHiﬁs/ all efwllf~ Mu); A— : ‘Sc'f' cf €994,483 “(M/KM 2, NH—U‘ OVW’C‘jeX W): C(3/2>~CC'7/Z> - m ...
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